Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 4 24.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 04/24/2019   10:31:07   (  -0.01,-137.20) (  -0.36,-135.74)  167.43                80
 04/25/2019   22:52:47   (   0.01,-137.18) (  -0.85,-140.97)  432.71                80
 04/26/2019   22:36:33   (   0.01,-137.17) (   0.18,-136.41)   87.57                80
 04/29/2019   10:36:31   (  -0.01,-137.17) (  -0.03,-137.05)   14.03                80
 05/01/2019   22:39:16   (   0.01,-137.13) (  -0.15,-137.71)   67.88                80
 05/02/2019   22:23:02   (   0.02,-137.11) (   0.88,-133.15)  451.79                80
 05/04/2019   10:44:35   (  -0.02,-137.11) (   0.23,-138.37)  142.38                80
 05/05/2019   10:23:00   (  -0.02,-137.09) (  -0.74,-133.79)  376.26                80
 05/06/2019   22:44:41   (   0.03,-137.04) (  -0.41,-139.04)  227.53                80
 05/07/2019   22:28:27   (   0.03,-137.02) (   0.62,-134.47)  290.97                80